Thank you for asking on HealthcareMagic.com, providing better healthcare for you. I have gone through your case and I can understand your concern. Rest at home after completed a full 24 hours of antibiotic & then you may go to trip in Europe. Yes, it is possible to come back, to prevent tonsillitis follow these lines: A. Avoid sick people and crowds. Stay at home if you are sick. B. Cover your mouth when coughing. C. Don’t share a drinking glass, kiss, or have close contact with anyone who has an upper respiratory infection. If swallowing is difficult, eat soft foods such as Jell-o, pudding, and soup & avoid salt and spicy foods. Increase your fluid intake to 10 to 12 glasses a day. Take Advil 400mg three times daily for pain & inflammation. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.Please don t forget to give your valuable feedback and five star rating, to help me assist you in a better way. Click at I Find This Answer Helpful too . Please, write a review about your experience with me.